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Use Return statement as the body for SQL-invoked functions
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89 changes: 89 additions & 0 deletions
89
presto-parser/src/main/java/com/facebook/presto/sql/tree/Return.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /* | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.facebook.presto.sql.tree; | ||
|
|
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| import com.google.common.collect.ImmutableList; | ||
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| import java.util.List; | ||
| import java.util.Objects; | ||
| import java.util.Optional; | ||
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| import static com.google.common.base.MoreObjects.toStringHelper; | ||
| import static java.util.Objects.requireNonNull; | ||
|
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| public class Return | ||
| extends Statement | ||
| { | ||
| private final Expression expression; | ||
|
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| public Return(Expression expression) | ||
| { | ||
| this(Optional.empty(), expression); | ||
| } | ||
|
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| public Return(NodeLocation location, Expression expression) | ||
| { | ||
| this(Optional.of(location), expression); | ||
| } | ||
|
|
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| private Return(Optional<NodeLocation> location, Expression expression) | ||
| { | ||
| super(location); | ||
| this.expression = requireNonNull(expression, "Expression is null"); | ||
| } | ||
|
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| public Expression getExpression() | ||
| { | ||
| return expression; | ||
| } | ||
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| @Override | ||
| public <R, C> R accept(AstVisitor<R, C> visitor, C context) | ||
| { | ||
| return visitor.visitReturn(this, context); | ||
| } | ||
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| @Override | ||
| public List<Node> getChildren() | ||
| { | ||
| return ImmutableList.of(expression); | ||
| } | ||
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| @Override | ||
| public int hashCode() | ||
| { | ||
| return Objects.hash(expression); | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object obj) | ||
| { | ||
| if (this == obj) { | ||
| return true; | ||
| } | ||
| if ((obj == null) || (getClass() != obj.getClass())) { | ||
| return false; | ||
| } | ||
| Return o = (Return) obj; | ||
| return Objects.equals(expression, o.expression); | ||
| } | ||
|
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| @Override | ||
| public String toString() | ||
| { | ||
| return toStringHelper(this) | ||
| .add("expression", expression) | ||
| .toString(); | ||
| } | ||
| } |
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